Command Staff

Special ServicesMiller
Commander Jeff Miller
Commander Jeff Miller has been a long-time resident of Ventura County, graduating from Thousand Oaks High School in 1986.  He holds a Bachelor of Science degree in Management from Pepperdine University and a Master of Science degree in Emergency Services Administration from California State University, Long Beach.  Jeff began his career with the Sheriff’s Office in 1994.  He has held a variety of assignments across all the Sheriff’s divisions, including serving as a department firearms instructor and working nearly half his career in various investigative assignments.  As a captain, Jeff oversaw the Major Crimes Unit, Internal Affairs Unit and patrol operations at the East County Patrol Station.  As a commander, Jeff oversaw patrol operations for the cities of Moorpark and Thousand Oaks before his current assignment in the Special Services Division where he is responsible for the Aviation, Crime Analysis, Intelligence, Major Crimes, Narcotics, SWAT, Tactical Negotiations, and Technical Surveillance Units.
Detention Services Administration
Commander Mark Franke
Commander Mark Franke has over 27 years of law enforcement experience.  Mark was raised in Ventura and began his career with the Ventura County Sheriff’s Office after graduating with a bachelor’s degree from UCSB.  As a Sergeant, Mark completed his master’s degree from California State University.  He worked detention services at both the Pre-Trial Detention Facility and the Todd Road Jail. He was assigned to the following patrol stations, Headquarters, Camarillo, and Ojai.  Mark has had the pleasure to serve within a variety of specialized units including Internal Affairs, the academy and as a School Resource Officer.  In addition, he has enjoyed many collateral assignments as a team member and supervisor including bike patrol, Public Information Officer, Arrest and Control Instructor, Field Training Officer, Police Activities League Director, Use of Force expert, Tactical Response Team, as well as managing the Honor Guard.  Mark has a passion for training and developing new deputies.  As a Captain he was the Patrol Watch Commander, Main Jail Captain and Director of the Police Academy.  He is an active member in the community and still lives in Ventura with his wife Kristin and their two teenage sons.
Thousand Oaks Police ServicesParis
Commander Jeremy Paris
Commander Jeremy Paris began his career with the Ventura County Sheriff’s Office in 1998 after attending Brigham Young University in Provo, Utah. He graduated with a Bachelor of Science degree in Geography. Jeremy has worked a variety of assignments in investigative and tactical units including; the Camarillo Special Enforcement Detail, the Sheriff’s Gang Unit, and the Narcotics Bureau.  He was also a member of the SWAT team for over ten years and has been managing the Bomb Squad for the last five years.   Jeremy was promoted to captain in 2016 and worked as a watch commander and the assistant chief of police in the City of Camarillo. In 2019, Jeremy was transferred to the Aviation Unit where he oversaw the Search and Rescue program and managed all aviation operations for the county.
East County Administration
Commander Eric Buschow
Commander Eric Buschow grew up in Ventura County and began working for the Sheriff’s Office in 1989. He has worked assignments at the Pre-Trial Detention Facility in Ventura and on patrol in Thousand Oaks and Moorpark. He also was a detective in Thousand Oaks for seven years and a team leader on the Tactical Negotiations Unit for 16 years. Eric also worked in Internal Affairs and served as the Adjutant to two elected Sheriffs. Eric has a bachelor’s degree in Journalism from California State University Northridge and served as a spokesman for the Sheriff’s Office for 21 years. Eric is currently assigned to the East County Patrol Station in Thousand Oaks, where he is responsible for patrol operations in the cities of Thousand Oaks and Moorpark. He also oversees the Tactical Response Team, K-9 Unit, Reserve Deputy program, and the Chaplain Cadre.
Rubright Professional Standards 
Commander Cory Rubright
Commander Cory Rubright began his career with the Ventura County Sheriff’s Office in 1990.  Cory has worked a variety of assignments in his 31 years including Detention Services at both the Pre-Trial Detention and Todd Road Jail Facilities as well as patrol assignments in Thousand Oaks, Headquarters and Camarillo.  During his career, Cory has held positions with the K9 Unit, Special Enforcement Detail and Special Weapons and Tactics Team (SWAT).  Later in his career he worked assignments in Investigations, In-Service Training and the Professional Standards Bureau.  As a Captain, Cory worked as a patrol watch commander, managed patrol operations at the East County Patrol Station, held the Assistant Chief of Police position at the Camarillo Patrol Station and worked both administrative and operational positions in Detention Services.  Cory has a Bachelor’s Degree in Criminal Justice Management from Union Institute and University.
West County Administration
Commander Alan Hartkop
Commander Alan Hartkop grew up in Burbank, California but has been a Ventura County resident for over 20 years.  Alan holds a bachelor’s degree in Criminal Justice Management and a master’s degree in Organizational Leadership.  Alan graduated the academy in 1994 and started his career with the Ventura County Sheriff’s Office.  Alan has held a variety of assignments in the Operations, Detention, and Support Divisions with an extensive background in investigations.  As a captain, Alan was assigned as a Patrol Watch Commander, oversaw operations at the Crime Lab as the Bureau Manager, and managed the Major Crimes Unit.  Alan is currently working at the Headquarters Station where he is responsible for patrol operations in the western unincorporated areas of the county and the cities of Ojai and Fillmore as well as operations at the Sheriff’s Communication Center.  Alan also oversees the Mounted Enforcement Unit, Homeless Liaison Unit, and is the department representative for the Sheriff’s Foundation
TennessenCamarillo Police Services
Commander Eric Tennessen
Commander Eric Tennessen began his career with the Ventura County Sheriff’s Office in 1998. He was born and raised in South Dakota and moved to California after obtaining his bachelor’s degree in Civil Engineering from the South Dakota School of Mines and Technology.  After a short stint as a civil engineer, Eric joined the Sheriff’s Office. During his career, Eric gained an extensive background in investigations, including assignments at various levels in the Camarillo Special Enforcement Detail, Moorpark Investigations Unit, Sheriff’s Major Crime’s Unit, Sheriff’s Gang Unit and Special Crimes Unit.  As a captain, Eric served as a watch commander before transferring to Thousand Oaks, where he oversaw patrol operations for the Sheriff’s largest contract city. Eric also held the position as the captain of the Santa Clara Valley station, where he served as the Chief of Police for the City of Fillmore for nineteen months. Eric promoted to Commander in October of 2019, where he was selected to serve as the Chief of Police for the City of Camarillo.  In addition to his bachelor’s degree, Eric earned a master’s degree in Public Administration from California State-Northridge. He is also a 2015 graduate of the Sherman Block Supervisory Leadership Institute.  Eric and his wife, Kaylee, reside in Camarillo with their four children.